Progress in polydimethylsiloxane-modified waterborne polyurethanes

Ji, Xuan; Wang, Hezhi; Ma, Xiaolong; Hou, Chao; Ma, Guozhang

doi:10.1039/c7ra05738e

Cited by 41 publications

(22 citation statements)

References 75 publications

(129 reference statements)

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“…Polydimethylsiloxane (PDMS) has many applications due to its unique properties, which mainly arise from its structure composed of organic grafted methyl group and inorganic SiO bond. These significant properties include great molecular flexibility, low surface energy, good hydrophobicity, flame retardancy, and so forth . PDMS had been widely added to PU to improve mechanical properties and surface and bulk properties .…”

Section: Introductionmentioning

confidence: 99%

“…These significant properties include great molecular flexibility, low surface energy, good hydrophobicity, flame retardancy, and so forth . PDMS had been widely added to PU to improve mechanical properties and surface and bulk properties . In the study of the chemical modification of polyamide 12 (PA12) through the reaction with a hydride‐terminated PDMS, it was found that the mechanical properties and thermal stability of PA12 were enhanced .…”

Section: Introductionmentioning

confidence: 99%

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Polydimethylsiloxane/monomer casting nylon copolymers: Preparation, flame‐retardant properties, and wear‐resistant properties

Lee

Yang

et al. 2019

J of Applied Polymer Sci

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In order to improve the toughness, wear resistance, and combustion properties of the monomer casting nylon (MC nylon) materials, the polydimethylsiloxane (PDMS) segment is bonded to the nylon molecular chain by copolymerization. PDMS/MC nylon copolymers are prepared via in situ anionic polymerization with macro‐activator based on PDMS terminated with hexamethylene diisocyanate. The effects of different macro‐activator content on the mechanical properties, water absorption, thermal stability, friction and wear properties, and combustion properties of the copolymers are characterized. The results show that the impact strength of the copolymer improves significantly (optimally increases by 2.6 times) and the water absorption rate decreases with the increase of PDMS content. The introduction of the silicon–oxygen structure reduces the peak heat release rate of copolymer materials (optimally decreases about 28.7%), while it promotes the decomposition of the system, resulting in a slight decrease in the thermal stability of the materials. Adding 5 wt % PDMS can decrease the wear loss of MC nylon from 6.2 mg of pure nylon to 1.6 mg. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48753.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Polydimethylsiloxane/monomer casting nylon copolymers: Preparation, flame‐retardant properties, and wear‐resistant properties

Lee

Yang

et al. 2019

J of Applied Polymer Sci

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“…Introducing organosilicon compounds into polymer melts and solutions is a rather common direction in modern polymer science and technology, as described in reviews (see, for example, [1]). As a rule, this approach is stipulated by wishing to combine, in one product, carbon chain polymers and silicate fragments that in some cases are important to reach the desired functional properties of the hybrid materials in practice [2].…”

Section: Introductionmentioning

confidence: 99%

Compositions Based on PAN Solutions Containing Polydimethylsiloxane Additives: Morphology, Rheology, and Fiber Spinning

2020

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The effect of additives of polydimethylsiloxanes (PDMS) with various molecular weights on the morphology and rheological behavior of polyacrylonitrile (PAN) solutions in dimethyl sulfoxide has been analyzed. It was shown that only partial compatibility of the PDMS with the lowest molecular weight member of the homologous series studied—hexamethyldisiloxane—with PAN solution takes place. All other PDMS samples form emulsions with PAN solutions. The coalescence rate of PDMS drops depends on the viscosity ratio of the disperse phase and the continuous medium, which determines both the duration of dispersion preparation and the conditions for processing emulsions into fibers and films. An anomalous change in viscosity for a series of emulsions with different concentrations of additives, associated with the slippage, was detected. The relaxation properties of emulsions “feel” macro-phase separation. Modeling of the wet spinning process has shown that the morphology of the deposited solution drop reflects the movement of the diffusion front, leading to the gathering droplets in the center of the deposited formulation drop or to their localization in a certain arrangement. It was shown that the emulsion jets upon stretching undergo phase separation.

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“…Poly-dimethyl siloxane (PDMS or silicone) can bring profound property changes to these hybrids. 8 Hydroxyl-terminated poly-dimethyl siloxane (PDMS-OH) reacted with nucleophilic 3-glycidoxy propyl tri-methoxy silane (TMSepoxy) resin systems. However, the reaction is complicated by the inherent insolubility of silicone in organic resins.…”

Section: Introductionmentioning

confidence: 99%

Encapsulation of flexible organic light emitting diodes by UV‐cure epoxy siloxane

Kermaninejad

Najafi

Soleimani‐Gorgani

2019

J of Applied Polymer Sci

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In this research, a silicon additive was synthesized by reaction of the hydroxyl terminated poly-dimethyl siloxane (PDMS-OH) with 3-glycidoxy propyl tri-methoxy silane (TMS-epoxy). The synthesized silicon additive characterized and evaluated to use as a curing agent for preparing high-performance and impermeable epoxy resin for encapsulation of flexible optoelectronic devices such as thin film photovoltaics and polymer light-emitting diodes to protect them against water penetration and increase their lifespan. The synthesized additive was characterized by FTIR, NMR, and elemental analysis. Thermal properties of the UV curable resin were investigated by using DSC and DMTA. The prepared UV cure epoxy resin exhibited an appropriate melting temperature (56.19 C). Contact angle test, SEM, and calcium test was used to investigate the properties of UV-cured coating resin. The water contact angle of the cured prepared resin film showed good hydrophobicity. The SEM results confirmed the uniformity of cured film and UV cure resin dispersion. Transparency and flexibility of the cured film to encapsulate the flexible light emitting diodes are acceptable. The permeability of cured film to water vapor was evaluated by calcium test, which shows the cured film suitability to encapsulate the FOLED.

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Progress in polydimethylsiloxane-modified waterborne polyurethanes

Abstract: Using polydimethylsiloxane (PDMS) to modify waterborne polyurethane (WPU) has proved to be an effective and feasible way to improve some key properties of WPU.

Cited by 41 publications

References 75 publications

Polydimethylsiloxane/monomer casting nylon copolymers: Preparation, flame‐retardant properties, and wear‐resistant properties

Polydimethylsiloxane/monomer casting nylon copolymers: Preparation, flame‐retardant properties, and wear‐resistant properties

Compositions Based on PAN Solutions Containing Polydimethylsiloxane Additives: Morphology, Rheology, and Fiber Spinning

Encapsulation of flexible organic light emitting diodes by UV‐cure epoxy siloxane

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